J 02 G Canadian Arctic Expedition, 1913-1918 



The column and basal expanse are smooth, with no epidermal coating; 

 tentacles are nvmierous, about 96, small and not very slender. Acontia were 

 not oliserved, but its general habit and internal structure are so much like some 

 of the Sagartiadffi that it proljably belongs to that family. It is possibly related 

 to Raphactis nitida Verrill or to R. abyssicola (Moseley). 



This has Ijeen found chiefly on large specimens of Paragorgia from the 

 Bank fisheries, Such specimens are generally dried, and so the Actinian is 

 spoiled. Specimens on the stalks of dead gorgonians in alcohol, formerly 

 described and figured by me as this species (op. cit., 1883, p. 48, pi. VI, fig. 9) 

 may l)e a distinct species. Its internal structure was not studied. 



Chondractinia Liitken. 



Chondractinia Lxjtken, Vidensk. JNIeddel. Naturhist. Foren. Kjobenhavn, 

 p. 184, 1860. (Type C. digitata MtJLL.). Haddon, op. cit. p. 305, 1889. 

 JNIcMuREicH, op. cit. p. 187, 1893. 



Actinauge {pars) Verrill, op. cit., 1883. 



Column stout, firm, bearing on the greater part large, permanent, thick 

 vcrruese or tubercles in more or less evident longitudinal rows, and usually 

 more or less covered with an imperfect epidermal coating. Cinclidse indistinct; 

 submarginal zone softer, flexible, not bearing crests or ribs. Sphincter muscle 

 large, thick, mesogloeal; mesoglcea unusually thick and firm. Six primary 

 jjairs of mesenteries strong, sterile. Two large siphonoglyphs. Tentacles 

 stout, without liasal lobes. 



Chondractinia tuberculosa (Verrill). 



Actinauge nodosa var. tiibercidosa Verrill, Bull. ]\Ius. Comp. Zoology, vol. 

 XI, p. 53, pi. VI, fig. 7, 1883; Annual Report of Comm. of Fish and Fisheries 

 for 1883, p. 612, pi. V, fig. 20a, 1885. 



Chondractinia tnbercidosn McMurrich, op. cit., 1893, p. 187. White wes op 

 cit., p. 38, 1901. 



Plate XIX; Fig. 5. 



The l)ody in this species is covered with remarkably large (5 to 10 mm. 

 broad), prominent, often hemispherical, firm tul)ercles,' arranged irregularly 

 and not very numerous. The integument is very thick and firm, exception the 

 pink or red capitulum, Ijelow the tentacles, where it is softer, slightly longitudi- 

 nally ridged, or nearly smooth, and probably capalile of secreting a phosphores- 

 cent mucous, as in A. verrillii. 



The lower tubercular part is usually covered with an adherent dirty brown 

 or mud-coloured epidermal secretion. When this coating is removed the colour 

 is usually light brown, flesh-colour, or pale red; the tubercles whitish. 



The tentacles are numerous, dull red or reddish bro\\Ta, rather long, usually 

 not bulbous at the base nor much tapered. The sphincter muscle is taro-e and 

 thick. ^ ^ t^ 



The mesenteries arc regularly hexamcrous in the specimens dissected and 

 very unequal. Six pairs are wde and perfect, and some mav bear small o-onads 

 near the base. Their longitudinal muscles are not very strongly developed 

 being scarcely thicker than the plicated transverse ones.' Those'^of the second 

 cycle are nearly as wide as the primaries in the lateral svstems. All are muscular 

 and bear lai'ge gonads. Much narrower mesenteries of the third and fourth 

 cycles occur iu all the systems and Ijear gonads. 



